Dust-collector.



F. J. BOWMAN.-

DUST COLLECTOR.

APPLICATION'FLLED APR. 18, 1914.

Patented July 31,1917.

r WM W n. stares new orrrcn.

FREDERICK JOSEPH BOWMAN, OF CLEVELAND, OHIO.

DUST-COLLECTOR.

Specification of Letters Patent.

Application filed April 18, 1914. Serial IlTo. 832,994.

The objects of the invention are to pro vide ,a collectin device for the dust produced in grinding or other machinery in which pulverized ores,-coal, malt, and farinaceous and other materials are treated, and in which great quantities of dust are produced, which are dissipated and lost, and which in the case of mineral substances en ter the working parts andjournal bearings of the machinery and lessen their efliciency and quickly wear them out.

The collecting device described also serves to recover gases and gaseous by-productsof all sorts which would otherwise be wasted, and it is especially adapted to collect and depositnoxious fumes and gases of all sorts before any injurious effects can be produced thereby.

To accomplishthis result the dust or gas is first absorbed by means of a vapor such as exhaust steamand is propelled through suitable conduits into a suitable series of collecting chambers where the vapor is condei'ised' and the-dust is deposited upon the walls of said chambers, and gas and gaseous products are removed with the liquid produced by condensation.

The results obtained eliminate all gases and fumes, and deposit every particle of dust, and prevent all waste.

This process is especially valuable where valuable ores are ground and all the dus and .residue are valuable. 1

It is also valuable incollecting gaseous byproducts of all sorts.

The invention is exemplified in the accompanying drawings, and is hereinafter more fully described, and specifically pointed out in the claims.

In the accompanying drawings Figure l is a vertical longitudinal section of an apparatus constructed and arranged to accomplish the desired results; Fig. 2. is a transverse section thereof through the settling tank.

In these views A is a hood which can be placed over an ore pul-verizing or other grinding machine or over a dust or gas producing device of any kind.

B is a fan or blower which quickly draws the dust or gaseous products from the hood and forces them into and through a conduit C which is preferably inclined down- \vardly and terminates in the first of a series of collecting chambers D, E, F and G through which the products described are Patented July 31, 1917.

carried by the current produced by the blower.

The products'when received in the conduit are subjected to a current of moist air or vapor such as exhaust steam at the point of condensation, which is conveyedthereto I through a pipe K preferably-closely adjacent to the blower which injects the vapor into the conduit longitudinally thereof.

The current of vapor charged with the products described passes downward through the conduit and enters the first chamber D where a portion of the vapor is condensed upon the walls thereof and the dust is deposited upon the. walls while the condensed vapor in a fluid form runs down the walls and collects upon the floor in a basin L'prepared therefor.

A certain amount of dust will also be 001- lected upon the floor or basin and the sur plus moisture will find its exit through a conduit L" to any convenient well or receptacle therefor.

The temperature of the series of chambers is lower than the temperature of the vapor and they are substantially alike but are separated by vertical baiile'plates M, M, M, M, which are spaced apart and preferably overlap at their adjoining edges as shown in Fig. 1, so as to check the passage of the dust laden vapor and give it an alternately upward anddownward direction, thus as: sisting in producing the condensation thereof upon the cold walls.

The moistened dust will be immediately discharged from the air which carries it as v the Vapor is condensed and will collect upon the walls and bottom and any gas or gaseous products will be absorbed by and carried away in the fluid deposit. Each chamber is provided with a settling basin L for dust from which the liquid escapes through a conduit L" as described for the first chamber. The air freed from vapor passes upward through a conduit N and thence downward at into a settling tank N Where the last vestige of dust is deposited and also any remaining gas or vapor is absorbed.

The Water in the tank N is preferably kept running by means of a hydrant 0 and overflow pipe P,

.The conduit 0 is preferably formed of vitrified pipe having smooth inner surfaces adapted to assist in the movement of the moistened masses passing therethrough.

The moisture formed by condensation of the vapor upon these surfaces will assist the current by its Weight in Washing the dust out of the condui This conduit is usually constructed of straight sections Q and spaced Ys B so connected as to present entremities r through Which the operator can have access to the interior to clean the pipe when any collection of material threatens to choke the conduit. These extremities are tightly closed by heads r, T when the conduit is in use.

By means oi the devices and method de scribed no vestige of dust or gaseous prod-- nets of any kind will remain in the current oi air which issues from the tank and no dust or gas Will remain in the vicinity of the machine, everything of this character being deposited. in the collecting chambers of which any desired number may be used.

vapor used can be drawn m the exhaust of a steam engine or -from the ex;- haust of a drier and may contain dust or may be obtained from any convenient source The functions of the vertical portions of the We R, R, of the conduit C are to provide baiiles in the conduit which serve to check and turn over the moist vapor and dust particles so as to thoroughly coinmingle them together and the general inclination of the conduit insures a thorough cleansing of every part and delivery of all the dust at the bottom in the form of mud or slime.

This construction adapts the device for general use in collecting all possible forms of dust such as dust from grinding machines, furnaces, hydrated lime, cement plates, pulverized coal and wherever there is an excess of dust.

Any kind of moist vapor such as exhaust steam not under pressure or vapor derived from dryin inoist materials or other Waste vapors can be usefully employed.

A distinct advantage found in the use of vapor not under pressure is that an excessive use is not a detriment but rather a beneiit, but in the processes requiring the mess ured use of steam under pressure an excess is productive of damage and is detrimental tr the product and apparatus.

The dust when coming in contact With the Walls absorbs the moisture and becomes heavy, and therefore is deposited immediately when coming in contact with any damp surface, and hence a large proportion of the dust is deposited in the inclined conduit.

The conduit as constructed presents Walls at various angles and the blower nropelling the dust andvapor thoroughly mixes them, and drives them against the Walls, Where the moisture is condensed.

Having described the invention What I claim as new and desire to secure by Letters Patent is:

1. In adust collector, the combination of dust propelling means, a separating chamber, and a dovrnvardly extending conduit connecting at its upper end with said pr0- 'pelling means and at its lower endwith said separating chamber, said conduit consisting of a plurality of alternately ar-- ranged vertical and inclined sections, each of such sections extending rcarwardly beyondits connection. to the next adjacent section and being provided at such extending end with a removable closure.

2. In a dust collector, the combination of a fan adapted to propel dust, a downwardly directed steam jot disposed tangentially with fan and jet, said casing being arranged to permit the steam from said et and the colrespect to said fan, a casing inclosing said 1 uinn or dust from said fan to converge,- a

downwardly extending conduit extending from said casing, said conduit consisting of alternately arranged vertical and inclined sections, such inclined sections being disposed in parallelism and at an angle/bf ap proximately d5 degrees to the vertical.

In testimony whereof I hereunto set hand this 31 day of M011 1914:.

' FREDERICK JOSEPH BGWMAN. ln presence of WM. M. lidonnon, Suns. C ans. 

